2. Integration of semi-structured documents
2.1 Choosing a pivot representation
The problems associated with exchanging documents with different formats could be solved by developing converters for each pair of document formats, as demonstrated by the trials of some editors on the market (for example, Word's "Save as HTML" option). This goal is difficult to achieve, however, given the multiplicity of these formats (for n formats, n 2 conversion programs). Standards (pivot formats) therefore play an important role, since only n converters are needed when transformation is carried out via a standard, which could be handled by a publisher's own utility from the standard (import) and to the standard (export).
These remarks highlight the importance of a pivot...
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Integration of semi-structured documents
A document manipulation language
Appendix: Sample queries
This illustration is based on the formulation of queries on an example document in SgmlQL.
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Example document (figure 1 and corresponding locator)
Note :Note...
References
In Techniques de l'Ingénieur, Computer Science section
Some reference sites for query languages
SgmlQL, an extension of the OQL language for querying SGML documents :
http://www.univ-tln.fr/~gect/simm/SgmlQL
LOREL, OQL extension with construction of generalized access paths in a graph :
http://www-db.stanford.edu/lore
XML-QL, proposal submitted to the W3 consortium: query language for XML documents,...
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